Robotic vacuum



FIG. 1 is a top perspective view of a robotic vacuum;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a rear elevation view thereof.

The broken lines in the drawings depict unclaimed subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a robotic vacuum, as shown and described. 